According to the Librewolf documentation, fingerprinting can be turned off, but they recommend adding the Canvas Blocker extension in its place. That is my current setup, as I didn’t like that websites in Librewolf couldn’t get the correct time and time zone for me.

Here’s the direct quote from the Librewolf documentation:

If you don’t like the downsides of RFP, or you are not concerned about fingerprinting, you can disable RFP in the LibreWolf settings, or in your overrides. In that case consider using an extension like CanvasBlocker to retain at least a minimum amount of fingerprinting protection.